OpenWrt One JTAG

[John Crispin]

JTAG has been tested and works fine, I managed to upload a ram uboot and 
reflash a board. obviously no mikrobus module can be populated. However 
it is recommended to use mtk_uartboot for worst case scenario recovery 
as described in the wiki

     John

On 27.02.25 03:07, Charlemagne Lasse wrote:
> Hi,
>
> Did anyone get the JTAG working on the OpenWrt One? It seems to me
> that the pins for JTAG are used also on microbus and various SPI
> connected chips. See
> https://one.openwrt.org/hardware/BPI_OpenWRT_ONE_V10_SCH_20240618-R.pdf
>
> I would therefore expect to not have access to it under OpenWrt
> (because of the DTS settings). If I read the schematics correctly, it
> is actively disabled even before OpenWrt because the R109 is not
> populated on the PCB. md32_ejtag_en is set to 0 (disabled) all the
> time.
>
> If this is correctly, OpenWrt One should not have been advertised as
> "JTAG for main SOC"
>
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